限制软件的使用次数

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Microsoft.Win32;

namespace ShowUseTimes
{
    public partial class Form1 : Form
    {
        public Form1（）
        {
            InitializeComponent（）;
        }

        private void frmMain_Load（object sender EventArgs e）
        {
            MessageBox.Show（“您现在使用的是试用版，该软件可以免费试用30次！“ “提示“ MessageBoxButtons.OK MessageBoxIcon.Information）;
            Int32 tLong;
            try
            {
                tLong = （Int32）Registry.GetValue（“HKEY_LOCAL_MACHINE\\SOFTWARE\\tryTimes“ “UseTimes“ 0）;
                MessageBox.Show（“感谢您已使用了“ + tLong + “次“ “提示“ MessageB

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     文件         926  2009-02-12 13:54  sj\01\ShowUseTimes\ShowUseTimes.sln
     文件       35840  2009-02-12 14:00  sj\01\ShowUseTimes\ShowUseTimes.suo
     文件        1879  2009-02-12 13:57  sj\01\ShowUseTimes\ShowUseTimes\Form1.cs
     文件        1682  2009-02-12 13:57  sj\01\ShowUseTimes\ShowUseTimes\Form1.designer.cs
     文件        5814  2009-02-12 13:56  sj\01\ShowUseTimes\ShowUseTimes\Form1.resx
     文件         493  2009-02-12 13:54  sj\01\ShowUseTimes\ShowUseTimes\Program.cs
     文件        3770  2009-02-12 13:57  sj\01\ShowUseTimes\ShowUseTimes\ShowUseTimes.csproj
     文件        8704  2009-02-12 13:57  sj\01\ShowUseTimes\ShowUseTimes\bin\Debug\ShowUseTimes.exe
     文件       19968  2009-02-12 13:57  sj\01\ShowUseTimes\ShowUseTimes\bin\Debug\ShowUseTimes.pdb
     文件       14328  2009-02-12 13:58  sj\01\ShowUseTimes\ShowUseTimes\bin\Debug\ShowUseTimes.vshost.exe
     文件         815  2009-02-12 13:58  sj\01\ShowUseTimes\ShowUseTimes\obj\Debug\ShowUseTimes.csproj.FileListAbsolute.txt
     文件         847  2009-02-12 13:57  sj\01\ShowUseTimes\ShowUseTimes\obj\Debug\ShowUseTimes.csproj.GenerateResource.Cache
     文件        8704  2009-02-12 13:57  sj\01\ShowUseTimes\ShowUseTimes\obj\Debug\ShowUseTimes.exe
     文件         180  2009-02-12 13:57  sj\01\ShowUseTimes\ShowUseTimes\obj\Debug\ShowUseTimes.Form1.resources
     文件       19968  2009-02-12 13:57  sj\01\ShowUseTimes\ShowUseTimes\obj\Debug\ShowUseTimes.pdb
     文件         180  2009-02-12 13:57  sj\01\ShowUseTimes\ShowUseTimes\obj\Debug\ShowUseTimes.Properties.Resources.resources
     文件        1380  2009-02-12 13:54  sj\01\ShowUseTimes\ShowUseTimes\Properties\AssemblyInfo.cs
     文件        2874  2009-02-12 13:54  sj\01\ShowUseTimes\ShowUseTimes\Properties\Resources.Designer.cs
     文件        5612  2009-02-12 13:54  sj\01\ShowUseTimes\ShowUseTimes\Properties\Resources.resx
     文件        1097  2009-02-12 13:54  sj\01\ShowUseTimes\ShowUseTimes\Properties\Settings.Designer.cs
     文件         249  2009-02-12 13:54  sj\01\ShowUseTimes\ShowUseTimes\Properties\Settings.settings
     文件         944  2009-02-12 14:00  sj\02\GetMCodeByCPUAndYP\GetMCodeByCPUAndYP.sln
     文件       36864  2009-02-12 14:08  sj\02\GetMCodeByCPUAndYP\GetMCodeByCPUAndYP.suo
     文件        1960  2009-02-12 14:06  sj\02\GetMCodeByCPUAndYP\GetMCodeByCPUAndYP\Form1.cs
     文件        3559  2009-02-12 14:06  sj\02\GetMCodeByCPUAndYP\GetMCodeByCPUAndYP\Form1.designer.cs
     文件        5814  2009-02-12 14:06  sj\02\GetMCodeByCPUAndYP\GetMCodeByCPUAndYP\Form1.resx
     文件        3829  2009-02-12 14:06  sj\02\GetMCodeByCPUAndYP\GetMCodeByCPUAndYP\GetMCodeByCPUAndYP.csproj
     文件         499  2009-02-12 14:00  sj\02\GetMCodeByCPUAndYP\GetMCodeByCPUAndYP\Program.cs
     文件        9728  2009-02-12 14:06  sj\02\GetMCodeByCPUAndYP\GetMCodeByCPUAndYP\bin\Debug\GetMCodeByCPUAndYP.exe
     文件       22016  2009-02-12 14:06  sj\02\GetMCodeByCPUAndYP\GetMCodeByCPUAndYP\bin\Debug\GetMCodeByCPUAndYP.pdb
     文件       14328  2009-02-12 14:07  sj\02\GetMCodeByCPUAndYP\GetMCodeByCPUAndYP\bin\Debug\GetMCodeByCPUAndYP.vshost.exe
............此处省略68个文件信息